Apollo Spas pool filters
The Unicel 2026 Replacement Guide lists 1 of the cartridges on this site for Apollo Spas. Most filter models use only one of these, so measure your old filter or check the number printed on its end cap.
| Cartridge (Pleatco / Unicel / Filbur) | Diameter × length | Sq ft | Models | Apollo Spas OEM # | Source |
|---|---|---|---|---|---|
| PA225 / C-4325 / FC-1220 / FC-0640 | 4-5/8" x 11-7/8" | 25 | not specified | not listed | Unicel p.27 |
If your Apollo Spas filter isn't here, it may not be in our checked list yet. We only publish matches we can confirm in a manufacturer catalog.